1. Bush is oblivious to budget disaster.

2. It certainly takes some degree of obliviousness for someone who has
invited himself over to your table to recognize that he is unwelcome.

Peccadilloes shows rule.

Sophie keeps giving hints that she likes him but David is too oblivious to realise

Phineas is oblivious to Isabella's everyday flirting.

Wow, I'm really oblivious, I never realize when people are on the phone and then I make an ass out of myself.

*made up*
Harry: How long has this been going on?

Hermione: Quite awhile, but for some reason you didn't know.

Ron: Yeah, mate. Your oblivious to nearly everything!

Harry: That isn't true!

Heemione: Harry, it is true.

"He accused her of being delirious she didn't care she is just oblivious"

"The two were inlove, the beauty was oblivious"